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HV: init and sanitize acrn multiboot info

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Initialize and sanitize a acrn specific multiboot info struct with current
supported multiboot1 in very early boot stage, which would bring below
benifits:

- don't need to do hpa2hva convention every time when refering boot_regs;

- panic early if failed to sanitize multiboot info, so that don't need to
  check multiboot info pointer/flags and panic in later boot process;

- keep most code unchanged when introduce multiboot2 support in future;

Tracked-On: #4419

Signed-off-by: Victor Sun <victor.sun@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Victor Sun
2020-02-17 09:24:44 +08:00
committed by wenlingz
parent 520a0222d3
commit 19ffaa50dc
12 changed files with 162 additions and 92 deletions
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2
hypervisor/boot/cmdline.c
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@@ -16,7 +16,7 @@ void parse_hv_cmdline(void)
const char *start = NULL;
const char *end = NULL;
if ((boot_regs[0] == MULTIBOOT_INFO_MAGIC) && (boot_regs[1] != 0U)) {
if (boot_from_multiboot1()) {
struct multiboot_info *mbi = (struct multiboot_info *)(hpa2hva_early((uint64_t)boot_regs[1]));
if ((mbi->mi_flags & MULTIBOOT_INFO_HAS_CMDLINE) != 0U) {